1. Stem cell depletion: an explanation of the late effects of cytotoxins;Hellman;Int. J. Radiat. Oncol.,1977
2. Organisation of haemopoietic stem cells: the generation-age hypothesis;Rosendaal;Cell Tissue Kinet.,1979
3. The relationship between the haemopoietic stem cell and the spleen colony-forming cell: A hypothesis;Schofield;Blood Cells,1978
4. The limited in vitro lifetime of human diploid cell strains;Hayflick;Exp. Cell Res.,1965
5. Serum albumin supplemented medium for long term activation of mammalian fibroblast strains;Todaro,1964